3.5 Carat Lab-Grown Diamond Rings
Three and a half carats, set and secured. These 3.5 carat lab-grown diamond rings come with the center stone in place and its cost included. Pick a shape, then white, yellow or rose gold or platinum, on the product page. The shanks stay narrow so the stone leads: plain metal, pavé shoulders, or a concealed halo tucked beneath.
$3,298 $6,596
$3,728 $7,456
$3,728 $7,456
$3,728 $7,456
$3,728 $7,456
$3,728 $7,456
$3,728 $7,456
$3,298 $6,596
$3,298 $6,596
$3,298 $6,596
$3,298 $6,596
$3,298 $6,596
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Shape at three and a half carats
At this weight the cut sets the character of the whole hand. A round measures about 9.7 mm across and gives the liveliest sparkle. Oval and marquise run lengthwise along the finger and read bigger still. Cushion and radiant are softened squares full of fire, and where an emerald cut is offered, its long step facets look like a hall of mirrors.
How much setting to add
- Solitaire: the stone alone on plain metal, the cleanest frame for a big center.
- Pavé shoulders: tiny lab-grown diamonds lead the eye up to the stone.
- Hidden halo: small stones circling the base, a detail kept for the side view.
Metal for a bold center
Platinum's weight and strength suit a heavy stone, and its white color keeps the center looking icy. White gold gives a similar effect at a lower price. Yellow and rose gold warm the setting and contrast with a colorless center. Bands run about 1.8–2.5 mm wide.
Everyday wear at this size
A 3.5-carat stone stands proud of the hand and is usually the first part to meet a doorframe. Leave it off for sport, housework and days spent hauling luggage. Have the prongs inspected yearly, and a weekly scrub under the stone keeps it bright.
3.5 Carat Lab-Grown Diamond Rings: Common Questions
How much does a 3.5 carat lab-grown diamond ring cost?
Rings here start at about $3,250, and most sit between about $3,450 and $3,600 for the finished ring with its 3.5-carat lab-grown center in the lowest-priced metal. Shape, platinum and pavé move the figure. Grown stones at three and a half carats are priced well below mined equivalents, though their resale value is low.
Is 3.5 carats a big diamond?
Yes. A 3.5-carat round measures about 9.7 mm across and spans most of an average finger, so it registers as a statement stone even at a distance. Ovals and marquises look larger again at the same weight, while a cushion gives a softer, more compact outline.
